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WO2013147065A1 - Procédé de fabrication d'un récipient contenant un fluide, procédé permettant de mettre sous pression l'intérieur d'un récipient, récipient rempli, procédé de moulage par extrusion-soufflage et dispositif de moulage par extrusion-soufflage - Google Patents

Procédé de fabrication d'un récipient contenant un fluide, procédé permettant de mettre sous pression l'intérieur d'un récipient, récipient rempli, procédé de moulage par extrusion-soufflage et dispositif de moulage par extrusion-soufflage Download PDF

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Publication number
WO2013147065A1
WO2013147065A1 PCT/JP2013/059345 JP2013059345W WO2013147065A1 WO 2013147065 A1 WO2013147065 A1 WO 2013147065A1 JP 2013059345 W JP2013059345 W JP 2013059345W WO 2013147065 A1 WO2013147065 A1 WO 2013147065A1
Authority
WO
WIPO (PCT)
Prior art keywords
container
mold
blow molding
liquid
blow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2013/059345
Other languages
English (en)
Japanese (ja)
Inventor
澄人 佐藤
田村　信之
猛 永嶋
雄一 奥山
一彦 清水
田中　敏正
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yoshino Kogyosho Co Ltd
Original Assignee
Yoshino Kogyosho Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2012079005A external-priority patent/JP5851308B2/ja
Priority claimed from JP2012145408A external-priority patent/JP6000691B2/ja
Priority claimed from JP2012170180A external-priority patent/JP5919127B2/ja
Application filed by Yoshino Kogyosho Co Ltd filed Critical Yoshino Kogyosho Co Ltd
Priority to US14/389,680 priority Critical patent/US10189594B2/en
Priority to CN201380027916.XA priority patent/CN104321270B/zh
Priority to EP13768238.1A priority patent/EP2832682B1/fr
Priority to EP18166154.7A priority patent/EP3360843B1/fr
Publication of WO2013147065A1 publication Critical patent/WO2013147065A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B61/00—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages
    • B65B61/24—Auxiliary devices, not otherwise provided for, for operating on sheets, blanks, webs, binding material, containers or packages for shaping or reshaping completed packages
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
    • B67C7/00—Concurrent cleaning, filling, and closing of bottles; Processes or devices for at least two of these operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/0261—Bottom construction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/08—Biaxial stretching during blow-moulding
    • B29C49/10—Biaxial stretching during blow-moulding using mechanical means for prestretching
    • B29C49/12—Stretching rods
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
    • B65B47/00—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved
    • B65B47/08—Apparatus or devices for forming pockets or receptacles in or from sheets, blanks, or webs, comprising essentially a die into which the material is pressed or a folding die through which the material is moved by application of fluid pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D1/00—Rigid or semi-rigid containers having bodies formed in one piece, e.g. by casting metallic material, by moulding plastics, by blowing vitreous material, by throwing ceramic material, by moulding pulped fibrous material or by deep-drawing operations performed on sheet material
    • B65D1/02—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents
    • B65D1/0223—Bottles or similar containers with necks or like restricted apertures, designed for pouring contents characterised by shape
    • B65D1/0261—Bottom construction
    • B65D1/0276—Bottom construction having a continuous contact surface, e.g. Champagne-type bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
    • B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
    • B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
    • B67C3/04—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus without applying pressure
    • B67C3/045—Apparatus specially adapted for filling bottles with hot liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
    • B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
    • B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
    • B67C3/22—Details
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C2049/023—Combined blow-moulding and manufacture of the preform or the parison using inherent heat of the preform, i.e. 1 step blow moulding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/46—Component parts, details or accessories; Auxiliary operations characterised by using particular environment or blow fluids other than air
    • B29C2049/4602—Blowing fluids
    • B29C2049/465—Blowing fluids being incompressible
    • B29C2049/4664—Blowing fluids being incompressible staying in the final article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C2049/4879—Moulds characterised by mould configurations
    • B29C2049/4892—Mould halves consisting of an independent main and bottom part
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B29C2049/7831—Measuring, controlling or regulating blowing pressure characterised by pressure values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/786—Temperature
    • B29C2049/7864—Temperature of the mould
    • B29C2049/78645—Temperature of the mould characterised by temperature values or ranges
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
    • B29C49/428—Joining
    • B29C49/42802—Joining a closure or a sealing foil to the article or pincing the opening
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/4273—Auxiliary operations after the blow-moulding operation not otherwise provided for
    • B29C49/4283—Deforming the finished article
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/48—Moulds
    • B29C49/54—Moulds for undercut articles
    • B29C49/541—Moulds for undercut articles having a recessed undersurface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/58—Blowing means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/78—Measuring, controlling or regulating
    • B29C49/783—Measuring, controlling or regulating blowing pressure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/10—Polymers of propylene
    • B29K2023/12—PP, i.e. polypropylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2067/00—Use of polyesters or derivatives thereof, as moulding material
    • B29K2067/003—PET, i.e. poylethylene terephthalate
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B67—OPENING, CLOSING OR CLEANING BOTTLES, JARS OR SIMILAR CONTAINERS; LIQUID HANDLING
    • B67C—CLEANING, FILLING WITH LIQUIDS OR SEMILIQUIDS, OR EMPTYING, OF BOTTLES, JARS, CANS, CASKS, BARRELS, OR SIMILAR CONTAINERS, NOT OTHERWISE PROVIDED FOR; FUNNELS
    • B67C3/00—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus; Filling casks or barrels with liquids or semiliquids
    • B67C3/02—Bottling liquids or semiliquids; Filling jars or cans with liquids or semiliquids using bottling or like apparatus
    • B67C3/22—Details
    • B67C2003/227—Additional apparatus related to blow-moulding of the containers, e.g. a complete production line forming filled containers from preforms

Definitions

  • the present invention relates to a method for manufacturing a container containing a content liquid.
  • the present invention also relates to a method for positively pressurizing the inside of a container hermetically filled with a liquid, and to a filled container in which a liquid is housed and in a positive pressure state.
  • the present invention also relates to a preform blow molding apparatus and a preform blow molding method.
  • This application includes Japanese Patent Application No. 2012-079005 filed in Japan on March 30, 2012, Japanese Patent Application No. 2012-145408 filed in Japan on June 28, 2012, and July 31, 2012. The priority is claimed on the basis of Japanese Patent Application No. 2012-170180 filed in Japan, the contents of which are incorporated herein by reference.
  • a preform is formed by biaxially stretching the preform while injecting the content liquid from its mouth in a heated state, and a sealing process for sealing the content liquid by attaching a lid to the mouth.
  • the manufacturing method of the bottle with content liquid which has is conventionally known (for example, refer patent document 1).
  • Patent Document 2 discloses a method for preventing deformation and crushing of a container. Specifically, when filling a container with the content liquid and sealing with a cap, liquid nitrogen is dropped into the container, and the inside of the container is pressurized by the vapor pressure of the liquid nitrogen, so-called positive. Pressure is applied.
  • Patent Document 3 discloses a method of blow molding a preform using a liquid instead of air as a pressurized medium.
  • the content liquid that is finally filled in the container can be used as the pressurizing medium, so that the production line can be simplified by omitting the filling step.
  • FIG. 10 is a schematic explanatory view of a blow molding apparatus for blow molding a preform using a liquid as a pressurized fluid.
  • the main part A of this apparatus has a mold 1101, a blow nozzle 1104, and a stretching rod 1108 that is inserted through the blow nozzle 1104 to longitudinally stretch the preform.
  • a pressurized liquid supply unit 1122 and a liquid supply unit 1123 are arranged adjacent to the main part A.
  • the pressurized liquid supply unit 1122 is a plunger pump, and operates using a pressurized fluid Fp supplied from a pressure device 1121 such as a pressure pump or a compressor via a pipe P101 as a power source.
  • the pressurized liquid supply unit 1122 supplies the pressurized liquid L to the inside of the preform 1031 that tightly fits the tip of the blow nozzle 1104 via the pipe P102 and the electromagnetic valve V102 through the blow nozzle 1104.
  • the liquid L adjusted to a predetermined temperature is supplied to the pressurized liquid supply unit 1122 via the pipe R101.
  • the preform 1031 is shaped along the shape of the cavity 1102 of the mold 1101 by the longitudinal stretching by the stretching rod 1108 and the expansion stretching by the pressurized liquid L, and the container 1041 is molded.
  • blow molded casings (so-called PET bottles) made of polyethylene terephthalate (PET) resin exhibit many excellent characteristics and have been used in various fields as casing containers.
  • PET polyethylene terephthalate
  • this type of container is molded by expanding and deforming a preform, which is injection-molded into a bottomed cylindrical shape, in an expanded state in a state where the preform is heated to a temperature at which a stretching effect can be exhibited. That is, as shown in FIG. 20 (corresponding to FIG.
  • the preform 2031 heated to a temperature at which the stretching effect is exerted is protruded upward from the mouth 2032 so that the mouth of the preform 2031
  • the neck ring 2033 integrally provided at the lower end of the outer peripheral surface of the portion 2032 is attached to the blow mold 2101 in a state where the neck ring 2033 is locked to the neck support collar 2103.
  • the guide tube portion 2110 which is the tip portion of the blow nozzle 2105 is loosely fitted into the mouth portion 2032 of the preform 2031.
  • the preform 2031 is stretched in the axial direction by the stretching rod 2116 inserted through the insertion hole 2111 formed through the center of the blow nozzle 2105, and the pressure supplied to the preform 2031 through the insertion hole 2111. Stretching is performed in the radial direction by blow air, which is a fluid, to achieve forming into a container 2041 which is a casing.
  • Patent Document 3 describes an invention relating to a method of blow molding a preform using a liquid instead of blow air as a pressurized fluid.
  • a molding method by using the content liquid finally filled in the product as the liquid, the filling process can be omitted and the production line can be simplified.
  • the preform is biaxially stretch blow molded
  • molding shrinkage may occur depending on the characteristics of the material.
  • the bottle contracts with the passage of time after the sealing process and the internal pressure increases, so that the bottom of the bottle bulges outward and the bottle can stand upright. There was a possibility of disappearing.
  • the bottle may be formed while injecting the content liquid, which may cause the contents to spill.
  • the present invention has been made in view of the actual situation, and an object of the present invention is to provide a method for producing a bottle with a liquid content in which shrinkage deformation of the bottle over time after the sealing process is suppressed.
  • the present invention provides a method for positively pressurizing the inside of a container without impairing productivity in a blow molding method using liquid as a pressure medium without using additional means such as dripping liquid nitrogen.
  • the purpose is to do.
  • the present invention provides a blow molding apparatus that uses a liquid that is finally filled into a product, such as beverages, cosmetics, and medicines, as a pressurized fluid, in the mouth of the container filled with the content liquid simultaneously with the molding of the container. It is an object of the present invention to provide a blow molding apparatus and a blow molding method that can form a predetermined amount of head space and can suitably prevent spillage of content liquid in the process from blow molding to capping the container mouth.
  • a method for producing a container with a content liquid wherein the preform is formed by a fluid pressure of a content liquid injected from a mouth portion of a bottomed cylindrical preform heated to a stretchable temperature.
  • Forming a container a sealing step for sealing the contents by attaching a lid to the mouth portion, and a pressurizing step for increasing the internal pressure of the container.
  • the inversion deformed portion is moved to the container.
  • the manufacturing method of the container containing a content liquid according to the second aspect of the present invention is the method for manufacturing a container containing a content liquid according to the first aspect, wherein the reverse deformation portion is formed at the bottom of the container. Yes. In this case, the uprightness of the container (bottle) can be reliably ensured.
  • the method for positive pressure inside the container according to the third aspect of the present invention includes a molding step of molding the container by blow molding using a liquid as a pressurizing medium, and a state in which the liquid is filled after the molding step.
  • the above method utilizes a blow molding method using a content liquid filled in a container as a pressurizing medium. After the container is blow-molded, the inside of the container can be positively pressurized by reducing the volume due to the post-shrinkage of the peripheral wall of the container after sealing, by sealing the mouth of the container in a state filled with the content liquid. .
  • the conventional method after blow molding, the once molded container is stored and refilled with the content liquid. Therefore, the mouth portion is sealed at the stage where the post-shrinkage of the container is saturated, and the post-shrinkage of the peripheral wall of the container cannot be used for positive pressure as described above.
  • the method for positive pressure inside the container according to the fourth aspect of the present invention is the method for positive pressure inside the container according to the third aspect, wherein the temperature of the liquid and the temperature of the mold used in the molding step are as follows. Adjust the degree of positive pressure by setting.
  • the temperature of the liquid and the temperature of the mold used for blow molding can be freely changed within a certain tolerance. . Therefore, the degree of positive pressure can be adjusted by changing the temperature of the liquid and the temperature of the mold used for blow molding.
  • the positive pressure inside the container according to the fifth aspect of the present invention is the positive pressure inside the container according to the third aspect, wherein the container is made of polypropylene (PP) resin.
  • PP resin can be biaxially stretched and blow molded, and in the molded product of the PP resin, post-shrinkage after molding is relatively large and progresses over time. Therefore, it is possible to achieve positive pressure by reducing the volume sufficiently and easily.
  • the positive pressure inside the container according to the sixth aspect of the present invention is the positive pressure inside the container according to the third aspect, wherein the container is made of polyethylene terephthalate (PET) resin.
  • PET resin is excellent in biaxial stretch blow moldability. Further, the post-shrinkage of the container after the molding accompanied with the stretch crystallization can achieve the positive pressure due to the volume reduction sufficiently and easily.
  • a filling container is a synthetic resin container containing a liquid therein, and the container is formed by blow molding using the liquid as a pressurizing medium. Then, after the container is blow-molded, the liquid used as the pressurized medium is filled as it is, the mouth of the container is sealed, and the volume of the container after the sealing is reduced due to post-contraction of the peripheral wall of the container. It is a filling container in a compressed state.
  • a blow molding method includes a molding step in which a preform is stretched and blown with a content liquid in a mold including a body mold and a bottom mold to mold a container, and the molding process. Later, in a state where the body mold is closed, the bottom mold is operated in a pulling direction to reverse the bulge shape of the bottom of the container, and at the same time, a gas is introduced into the container and the head is And a head space forming step for forming a space.
  • the container after the molding process is in a state in which the inner solution is filled therein, and is in a state in which the internal pressure of the content liquid that attempts to expand the container to the outside is loaded.
  • the body mold is closed and the bottom mold is operated in the pulling direction to reversely deform the bulge shape of the bottom of the container, and at the same time, gas is introduced into the container.
  • a head space corresponding to the volume change associated with the reverse deformation of the bottom of the container can be formed in the mouth of the container.
  • the blow molding method according to the ninth aspect of the present invention is the blow molding method according to the eighth aspect, wherein the bottom mold has a catching part that is caught by the central part of the bottom part of the container in contact with the bottom mold. And in the head space forming step, in a state where the hooking portion of the bottom mold is hooked on the central portion of the bottom of the container, the bottom mold is operated in a direction of pulling out the bottom mold from the bottom of the container.
  • the gas is introduced into the container to form the head space.
  • the bottom mold is provided with a catching part that is caught in the center of the bottom of the container, so that when the bottom mold is pulled out of the container, the catching part is caught on the bottom of the container, and the bulging shape of the bottom of the container is It can be suitably reversed to the outside.
  • the blow molding method according to a tenth aspect of the present invention is the blow molding method according to the ninth aspect, wherein the catching portion of the bottom mold is a convex portion having a diameter increasing toward the tip. .
  • the bottom mold is provided with a convex part that expands toward the tip, so that when the bottom mold is pulled out of the container, the convex part is caught on the bottom of the container, and the bulging shape of the bottom of the container is Can be suitably reversed from the outside to the outside.
  • the blow molding method according to an eleventh aspect of the present invention is the blow molding method according to the eighth aspect, wherein the bottom mold is a rod-shaped first mold and a ring shape surrounding the first mold.
  • the tip of the first die has a convex portion that increases in diameter toward the tip, and the bottom die is pulled out from the bottom of the container in the head space forming step.
  • the gas is introduced into the container to form the head space at the same time as the bulging shape of the bottom of the container is reversed to the outside of the container.
  • the bulging shape of the bottom of the container can be suitably reversed from the inside to the outside of the container by performing the drawing of the bottom mold that causes the deformation of the bottom of the container in two stages.
  • the blow molding method according to a twelfth aspect of the present invention is the blow molding method according to the eighth aspect, wherein the bottom mold is a rod-shaped first mold and a ring shape surrounding the first mold. And in the head space forming step, by projecting the first mold with respect to the second mold, the bulge shape of the bottom of the container is reversed to the inside of the container, By operating in the direction of pulling out the first mold, the bulge shape of the bottom of the container is reversed, and at the same time, the gas is introduced into the container to form the head space.
  • the first mold is protruded and the bulging shape of the bottom of the container is inverted and deformed toward the inside of the container, and then the first mold is operated in the direction of pulling downward, and at the same time, gas is introduced into the container.
  • the head space By introducing the head space, a head space corresponding to the volume change associated with the reverse deformation can be formed in the mouth of the container.
  • a blow molding apparatus is a blow molding apparatus for forming a container by stretching and blowing a preform with a content liquid in a mold, and the mold includes a body mold and a bottom mold.
  • the bottom mold is operated in the direction of pulling out, and at the same time, the bulge shape of the bottom of the container is reversed, and at the same time, gas is supplied to the container.
  • It is a blow molding device that is introduced inside to form a head space.
  • blow molding method according to the eighth aspect can be suitably implemented.
  • the blow molding apparatus is the blow molding apparatus according to the thirteenth aspect, wherein the bottom mold has a hooking portion that is hooked on a central portion of the bottom portion of the container that is in contact with the bottom mold.
  • the bottom portion of the container is operated by pulling the bottom mold from the bottom portion of the container in a state where the hook portion of the bottom mold is hooked on the central portion of the bottom portion of the container.
  • the gas is introduced into the container to form the head space.
  • blow molding method according to the ninth aspect can be suitably implemented.
  • the blow molding apparatus according to the fifteenth aspect of the present invention is the blow molding apparatus according to the fourteenth aspect, wherein the catching part of the bottom mold is a convex part whose diameter increases toward the tip. .
  • blow molding method according to the tenth aspect can be suitably implemented.
  • the blow molding apparatus is the blow molding apparatus according to the thirteenth aspect, wherein the bottom mold is a ring-shaped surrounding the first mold and the rod-shaped first mold.
  • the tip of the first mold is a convex portion that increases in diameter toward the tip, and operates in the direction of pulling out the bottom mold from the bottom of the container, At the same time as the bulge shape of the bottom of the container is reversed to the outside of the container, the gas is introduced into the container to form the head space.
  • blow molding method according to the eleventh aspect can be suitably implemented.
  • the blow molding device is the blow molding device according to the thirteenth aspect, wherein the bottom mold is a rod-shaped first mold and a ring shape surrounding the first mold.
  • the first mold is inverted to the inside of the container by projecting the first mold with respect to the second mold after the blow is completed, and the first mold is inverted.
  • the bulge shape of the bottom of the container is reversed, and at the same time, the gas is introduced into the container to form the head space.
  • blow molding method according to the twelfth aspect can be suitably implemented.
  • the content liquid can be filled simultaneously with the molding of the container. it can.
  • the inside of the container can be positively pressurized by reducing the volume due to the post-shrinkage of the peripheral wall of the container after the sealing without impairing the productivity.
  • a desired amount of head space can be formed in a container obtained by blowing a preform with a content liquid in a mold. .
  • the spillage of the content liquid can be suitably prevented in the process from blow molding to capping the container mouth.
  • the shape of the bottom part of the container swells outside the container, the shape of the bottom part is restored when the inside of the container is depressurized after capping. Therefore, unauthorized deformation due to reduced pressure can be suitably prevented.
  • the preform is stretched by the fluid pressure of the content liquid injected from the mouth of the bottomed cylindrical preform heated to a temperature at which the bottle can be stretched.
  • a forming step to be formed and a sealing step for sealing the contents by attaching a lid to the mouth portion are performed.
  • an inversion deformable portion that can be inverted and deformed toward the inside of the bottle is formed in the bottle.
  • a reversal deformation part is reversed toward the inside of the bottle to reduce the volume of the bottle, thereby increasing the internal pressure of the bottle. Do more.
  • each step will be described in detail.
  • the bottomed cylindrical preform 1 is placed in a molding die in a state heated to a temperature at which it can be stretched.
  • the side where the mouth portion 2 of the preform 1 is located is referred to as the upper side
  • the side where the bottom portion of the preform 1 is located is referred to as the lower side.
  • the molding die includes a support portion 3 that supports an annular neck ring 4 projecting from the outer peripheral surface of the mouth portion 2 of the preform 1 from below and keeps the preform 1 suspended in the die. Is arranged.
  • a male screw portion 5 is formed in a portion located above the neck ring 4 on the outer peripheral surface of the mouth portion 2 of the preform 1.
  • the injection nozzle 6 is inserted downward from the mouth portion 2 into the preform 1, and the content liquid is injected into the preform 1 from the injection nozzle 6. Then, the preform 1 is biaxially stretched by the fluid pressure of the content liquid injected from the injection nozzle 6.
  • the jet nozzle 6 may be changed to a stretching rod, and biaxial stretching may be performed by stretching in the vertical direction with the stretching rod and stretching with the fluid pressure of the content liquid. You may use an injection nozzle as an extending
  • FIG. 2 shows the bottle 10 formed in the molding process.
  • the bottle 10 contains contents injected from the injection nozzle 6.
  • O indicates an axis passing through the center of the cross section of the bottle 10, and in the following, a direction orthogonal to the axis O is referred to as a radial direction, and a circumferential direction of the axis O is referred to as a circumferential direction.
  • the bottle 10 has a mouth part 2, a shoulder part 11 that is connected to the lower end of the mouth part 2 and expands in diameter as it goes downward, a body part 12 that is connected to the shoulder part 11 and extends downward, And a bottom portion 13 for closing the lower end opening of the body portion 12.
  • the body 12 is formed in a cylindrical shape.
  • a reversal deformable portion 15 that can be reversibly deformed toward the inside of the bottle 10 is formed on the bottom portion 13.
  • the inversion deforming portion 15 is formed in a curved surface protruding downward.
  • a lid (screw cap) 16 is screwed onto the male screw portion 5 of the mouth portion 2 to seal the contents of the bottle 10.
  • the body portion 12 is not substantially deformed, and the internal volume of the bottle 10 is reduced by the reverse deformation portion 15 being reversely deformed.
  • the reverse deformation portion 15 is reversely deformed toward the inside of the bottle 10 by applying a compressive force in the direction of the axis O to the bottle 10.
  • the reverse deformation portion 15 As a means for deforming the reverse deformation portion 15, it may be pressed by a press machine or may be performed manually. This reverse deformation part 15 is deformed so as to maintain the reverse position.
  • the content liquid and air in the bottle 10 are compressed, and the internal pressure of the bottle 10 is increased as compared with the state shown in FIG.
  • the content liquid and air in the bottle 10 are the differential pressure between the internal pressure and the atmospheric pressure outside the bottle 10.
  • the pressure of the minute is loaded from the inside of the bottle 10 toward the outside.
  • the shrinkage deformation of the entire bottle 10 is suppressed by the pressure applied by the content liquid and the air in the bottle 10. Moreover, since the reverse deformation
  • the internal pressure of the bottle 10 is increased through the pressurizing step before the temperature of the bottle 10 is lowered to room temperature, and the deformation of the reversing deformation portion 15 is suppressed. The Therefore, the shrinkage deformation of the bottle 10 with the passage of time after the sealing step is suppressed.
  • transformation part 15 was provided in the bottom part, you may form in a shoulder part etc., These numbers, a shape, etc. are not specifically limited.
  • FIG. 5 is a front view showing an example of a blow-molded container in the method for positive pressure inside the container of the present embodiment.
  • the container 141 has a mouth part 142, a body part 144 that is connected to the lower end of the mouth part 142 and extends downward, and a bottom part 145 that closes the lower end opening of the body part 144.
  • the container 141 is made of a PP-based propylene / ethylene random copolymer resin (J246M manufactured by Prime Polymer Co., Ltd.), and has a body diameter of 73.5 mm, a nominal capacity of 360 ml, and a weight of 5 g.
  • J246M PP-based propylene / ethylene random copolymer resin
  • FIG. 6 is a schematic explanatory view showing a blow molding apparatus using a liquid as a pressure medium, which is used in the method for positive pressure inside the container of the present embodiment.
  • FIG. 6 shows a state where the preform 131 is attached to the mold 101 and the tip of the blow nozzle 104 is fitted into the mouth portion 132 of the preform 131.
  • the shape of the preform 131 to be used is a bottomed cylindrical test tube as a whole, and a mouth 132 is provided at the upper end.
  • a neck ring 133 is disposed at the lower end of the mouth 132.
  • the preform 131 is mounted in the mold 101 with the mouth portion 132 protruding outward (upward in FIG. 6).
  • the main part of this apparatus includes a mold 101, a partition member 111, and a blow nozzle 104, and a pressurizing device 121, a pressurized liquid supply unit 122, and a liquid supply unit 123 are arranged as accessory equipment.
  • the partition member 111 is disposed above the mold 101 and surrounds the outer peripheral surface of the mouth portion 132 of the preform 131 protruding above the mold 101 through a space.
  • the blow nozzle 104 has a cylindrical shape as a whole, and includes an insertion tube piece 105 and a supply tube portion 106.
  • the cylindrical tip portion of the fitting tube piece 105 is fitted into the mouth portion 132 of the preform 131, and the blow nozzle 104 and the mouth portion 132 are in close communication with each other.
  • the supply cylinder part 106 is a member having a hollow part whose inside is a columnar shape as a whole.
  • An introduction path 106 a for the liquid L penetrating the peripheral wall in the lateral direction is disposed at the upper end portion of the supply cylinder portion 106.
  • a seal step portion 106s inclined so as to decrease in diameter downward is provided on the inner peripheral surface of the lower end portion of the supply cylinder portion 106.
  • a rod-like seal body 109 elongated in the axial direction (vertical direction in FIG. 6) is inserted and arranged.
  • the seal body 109 is configured by inserting an elongated cylindrical rod 108 into a slender cylindrical rod-shaped shaft body 109a so as to be slidable in a liquid-tight manner.
  • a short cylindrical seal tube piece 109t is coaxially fitted and assembled to the tip of the shaft body 109a.
  • the outer peripheral edge portion of the lower end surface of the seal tube piece 109t is rounded to form a tapered edge portion 109ta.
  • the blow nozzle 104 and the seal body 109 form a cylindrical supply path Fs communicating with the preform 131 in the blow nozzle 104 along the axial direction of the blow nozzle 104.
  • the taper edge 109ta of the seal cylinder piece 109t is brought into contact with the seal step 106s provided around the inner peripheral surface of the lower end of the supply cylinder 106.
  • the communication of the supply path Fs into the preform 131 is closed.
  • the seal body 109 is displaced upward, the communication of the supply path Fs into the preform 131 is opened.
  • the valve mechanism Vm is configured by such contact and disengagement of the tapered edge portion 109ta with the seal step portion 106s.
  • the rod 108 is for controlling the head space HS in the container 141 filled with the liquid L used as the pressurized fluid at the time of blow molding as the content liquid at a predetermined amount.
  • the rod 108 can be used as a stretching rod for longitudinally stretching the preform 131.
  • a pressurizing device 121 In the attached equipment, a pressurizing device 121, a pressurized liquid supply unit 122, and a liquid supply unit 123 are disposed.
  • the pressurized fluid Fp supplied from the pressurizing device 121 via the pipe P1 serves as a power source for the pressurized liquid supply unit 122 that is a plunger pump that supplies the pressurized liquid L.
  • the liquid L adjusted to a predetermined temperature is supplied to the pressurized liquid supply unit 122 via the pipe R1 and the electromagnetic valve V1.
  • the liquid L pressurized by the pressurized liquid supply unit 122 is supplied to the inside of the preform 131 that is tightly fitted around the tip of the blow nozzle 104 through the pipe P2 and the electromagnetic valve V2 through the blow nozzle 104. Is done.
  • FIGS. 7A to 7D are schematic explanatory views showing an example of steps of the positive pressure forming method of the present embodiment.
  • the following steps (1) to (4) are sequentially performed.
  • FIG. 7D shows a filling container according to an embodiment of the present invention.
  • the taper edge 109ta of the seal tube piece 109t constituting the tip of the seal body 109 is brought into contact with the seal step 106s of the supply tube portion 106, the valve mechanism Vm is closed, and the rod 108 is further lowered. It is in a state in which the tip portion is displaced and inserted into the preform 131 by a predetermined length. At this time, the valve V1 is open and V2 is closed.
  • the buckling strength of the filled container manufactured using the positive pressure method described above was measured. Specifically, water is used as the liquid L, blow molded in accordance with the positive pressure forming method described above, and sealed with the cap 147 immediately after molding, thereby filling the filled containers of Examples 1, 2, and 3. Manufactured. For each of the filled containers of Examples 1, 2, and 3, the change in pressure (kPa) in the container 141 over time after sealing with the cap 147 was measured, and the buckling strength after 24 hours was measured.
  • the molding conditions of Examples 1 to 3 are as follows.
  • Example 1 Liquid L temperature 20 ° C, mold temperature 20 ° C ⁇ Example 2> Liquid L temperature 20 ° C, mold temperature 80 ° C ⁇ Example 3> Liquid L temperature 70 ° C, mold temperature 20 ° C
  • the preheating temperature of the preform was 120 to 150 ° C.
  • the filling pressure of the liquid L was 4 MPa, and the amount of the head space HS was 10 ml.
  • drum 144 was also measured with pressure over time.
  • the pressure in the container 141 and the buckling strength are measured at 23 ° C., which is room temperature, and the respective measuring methods are as follows.
  • ⁇ Measurement method of pressure in the container A rubber stopper that exhibits a sealing function is attached to the upper part of the cap 147, and a pressure sensor is inserted into the container 141 through the top wall of the cap 147 through this rubber stopper, and the pressure inside the container 141 is reduced. It was measured.
  • ⁇ Measurement method of buckling strength After 24 hours from the manufacture of the filled container, the container 141 sealed with the cap 147 was compressed along the central axis at a speed of 50 mm / min using an autograph (AGS-X) manufactured by Shimadzu Corporation. The load at the time of buckling deformation was defined as the buckling strength.
  • FIG. 8 is a graph showing the measurement results of the filled container of Example 1, with the horizontal axis representing time and the vertical axis representing shrinkage rate (%) and pressure (kPa).
  • the solid line indicates the pressure in the container, and the broken line indicates the contraction rate.
  • the pressure in a container is shown by the difference with atmospheric pressure.
  • the shrinkage (%) was calculated from the diameter D immediately after sealing with the cap 147 and the diameter Dt at the elapsed time t according to the following equation.
  • the diameter D of the body 144 contracts abruptly at first, and in about 6 hours, the contraction is almost saturated and becomes about -3.4%.
  • the pressure in the container rises rapidly at first so as to correspond to the contraction behavior of the diameter D described above, and is almost saturated in about 6 hours to about 12 kPa. That is, it was confirmed that the inside of the container can be positively pressurized by post-shrinkage after the container 141 is molded.
  • FIG. 9 is a comparison of changes in pressure in the containers 141 of Examples 1, 2, and 3.
  • a change in pressure in Example 1 is indicated by a solid line T1
  • a change in pressure in Example 2 is indicated by a broken line T2
  • a change in pressure in Example 3 is indicated by a one-dot chain line T3. Comparing T1 and T2, when the temperature of the liquid L is set to 20 ° C. and the mold temperature is increased from 20 ° C. to 80 ° C., the internal pressure slightly decreases, and the pressure in the container 141 in the saturated state is from 12 kPa to 9. It drops to about 7 kPa.
  • the container When the mold temperature is increased in the production of a PP resin container, the container is cooled and solidified in the mold in a state in which the crystallization of the PP resin has further progressed, so that the post-shrinkage of the container is reduced. It is thought that the degree of positive pressure was reduced.
  • the buckling strengths of the filled containers of Examples 1, 2, and 3 were 68.5 (N), 59.3 (N), and 50.6 (N), respectively.
  • the magnitude of the buckling strength corresponds to the degree of positive pressure.
  • the buckling strength measured in the same manner for the filled container of the comparative example was 44.6 (N). It was confirmed that the positive pressure in Examples 1, 2, and 3 described above can increase the buckling strength of the filling container filled with the liquid L according to the degree of positive pressure.
  • the blow molding apparatus shown in FIG. 6 is an example of the present invention.
  • the rod 108 may be used as a stretching rod for longitudinally stretching the preform 131, and biaxial stretching blow molding in which longitudinal stretching by the rod 108 and expansion stretching by the pressurized liquid L are combined may be performed.
  • a seal body 109 is provided to open and close the supply path Fs of the liquid L into the preform.
  • this opening / closing mechanism can be selected from various aspects in consideration of productivity, accuracy of the amount of head space, and the like.
  • an additional facility is appropriately installed as necessary, such as a liquid circulation device for circulating the liquid L staying in the supply path Fs in the blow nozzle 104 as an additional facility. It can also be added and arranged.
  • PET resin which has the outstanding biaxial stretch blow moldability and sufficient post-shrinkability is also suitable for the positive pressure method of this invention.
  • One of the synthetic resins In addition to PP resin and PET resin, any synthetic resin conventionally used for biaxial stretch blow molding such as polyethylene naphthalate (PEN) resin and polylactic acid (PLA) resin can be used. It can be used as a synthetic resin suitable for the positive pressure method.
  • the temperature of the liquid L can be appropriately selected in consideration of the temperature for sterilization required for the filling container.
  • the mold temperature can be appropriately selected in consideration of productivity, surface gloss, etc. in addition to the required post-shrinkage.
  • the degree of positive pressure adjustment is adjusted by several requirements such as the temperature of the synthetic resin used, the temperature of the liquid used, the temperature of the mold used for blow molding, the vertical and horizontal draw ratio in blow molding, the amount of head space in the filling container, etc. It can be decided by doing.
  • size of the post-contraction of a container can be adjusted with the synthetic resin to be used and blow molding conditions.
  • the post-shrinkage of the container proceeds rapidly immediately after molding and then saturates to a certain size over a long period of time. Therefore, in order to make maximum use of the post-contraction of the container for positive pressure, it is preferable to seal the mouth immediately after blow molding.
  • the temperature of the liquid to be used is increased, the inside of the container is depressurized due to the decrease in temperature after sealing, and the positive pressure effect due to the post-contraction of the container is reduced accordingly. Therefore, from the viewpoint of increasing the degree of positive pressure, the temperature of the liquid is preferably as low as possible. On the other hand, it is necessary to consider the need for sterilization by filling with high-temperature liquid, blow moldability, and the like. Therefore, the temperature of the liquid needs to be determined in consideration of these factors in addition to the degree of positive pressure required.
  • the degree of positive pressure may be adjusted by setting the temperature of the liquid and the temperature of the mold used for blow molding.
  • the degree of positive pressure is determined by several requirements. For example, even when requirements such as the shape of the container, the synthetic resin used, the amount of head space, etc. are constrained, the temperature of the liquid and the temperature of the mold used for blow molding can be freely changed within a certain tolerance. Can do. Therefore, the degree of positive pressure can be adjusted by changing the temperature of the liquid and the temperature of the mold used for blow molding.
  • the mold temperature may be set lower. In this case, the molding is completed in a state where the crystallization has not progressed sufficiently, and the subsequent shrinkage can be increased by the progress of the crystallization over time.
  • the container may be made of polypropylene (PP) resin.
  • PP polypropylene
  • the PP resin can be biaxially stretched and blow molded, and in the molded product of the PP resin, post-shrinkage after molding is relatively large and progresses over time. Therefore, it is possible to achieve positive pressure by reducing the volume sufficiently and easily.
  • the PP resin used in the present embodiment is not particularly limited, but a crystalline polypropylene resin is preferable in consideration of shrinkage.
  • polypropylene resins that can be preferably used include crystalline propylene homopolymer, crystalline propylene / ethylene random copolymer, crystalline propylene / ⁇ -olefin random copolymer, propylene, ethylene and / or ⁇ -olefin.
  • a crystalline block copolymer examples include ⁇ -olefins having 4 to 10 carbon atoms such as butene-1, pentene-1, hexene-1, octene-1, and decene-1.
  • the container may be made of polyethylene terephthalate (PET) resin.
  • PET resin is excellent in biaxial stretch blow moldability. Further, the post-shrinkage of the container after the molding accompanied with the stretch crystallization can achieve the positive pressure due to the volume reduction sufficiently and easily.
  • FIG. 11 is a schematic explanatory view showing the overall configuration of a blow molding apparatus according to the third embodiment of the present invention.
  • the preform 231 mounted on the mold 201 is indicated by a dotted line
  • a box-shaped container 241 formed from the preform 231 is indicated by a solid line.
  • the shape of the preform 231 to be used is a bottomed cylindrical test tube as a whole, and a mouth tube portion (also referred to as a mouth portion) 232 is provided at the upper end portion.
  • a neck ring 233 is disposed at the lower end of the mouth tube portion 232.
  • the preform 231 is mounted in the mold 201 with the mouth tube portion 232 protruding outside (upward in FIG. 11).
  • the main part of this apparatus includes a mold 201, a partition member 211, and a blow nozzle 204, and includes a pressurizing device 221, a pressurized liquid supply unit 222, and a pressurized gas supply unit 223 as accessory equipment.
  • the mold 201 includes a pair of trunk molds 201SR and 201SL that mold the trunk of the container 241 and a bottom mold 201B that molds the bottom of the container 41.
  • the bottom mold 201B is formed with a thick convex portion having a tapered surface 201B_1 having a thick side surface at the center so that the bottom mold 201B is suitably hooked to the bottom of the container 241. That is, the convex portion of the bottom mold 201B has a diameter that increases toward the tip, and forms a catching portion.
  • the partition wall member 211 is disposed above the mold 201, and surrounds the outer peripheral surface of the mouth tube part 232 of the preform 231 protruding above the mold 201 via the space S. To do.
  • the mounting posture of the preform 231 is maintained by closely contacting the support collar 212 provided around the lower end of the partition wall member 211 with the neck ring 233 of the preform 231 from above.
  • the blow nozzle 204 includes an insertion cylinder piece 205 and an introduction cylinder part (also referred to as a supply cylinder part) 206 that are closely connected by a seal member 207b.
  • the fitting cylinder piece 205 has a cylindrical shape as a whole and has a cylindrical hollow portion inside.
  • a circumferential step portion 205 a that decreases in diameter toward the tip is provided around the outer peripheral wall of the fitting cylinder piece 205.
  • the cylindrical tip end portion of the fitting tube piece 205 is fitted into the mouth tube portion 232 of the preform 231, and the peripheral step portion 205 a abuts the mouth tube portion 232 via a seal member (O-ring) 207 a at the upper end surface.
  • the blow nozzle 204 and the mouth tube portion 232 are closely connected in a continuous manner.
  • the introduction cylinder part 206 is formed and disposed with a through flow path 206a serving as a supply path for the pressurized liquid L so as to penetrate the peripheral wall in a penetrating manner at a predetermined height position.
  • the supply of the pressurized liquid L to the through flow path 206a can be stopped by the electromagnetic valve Va.
  • a vent hole 206b for communicating the outside and the inside of the introduction tube portion 206 is formed and disposed. This communication state can be opened and closed by the electromagnetic valve Vb.
  • a check valve (not shown) is provided in the vicinity of the fitting cylinder piece 205 of the vent hole 206b so that the pressurized liquid L does not flow into the vent hole 206b.
  • the electromagnetic valve Va is disposed in the through flow path 206a
  • the electromagnetic valve Vb is disposed in the vent hole 206b.
  • other types of valves may of course be disposed.
  • the pressurizing device 221 has been conventionally indispensable equipment for blow molding, and is a large equipment such as a pressurizing pump or a compressor.
  • Pressurized fluid (drive fluid) is supplied from the pressurizer 221 to the pressurized liquid supply unit 222 via the pipe P201 or to the pressurized gas supply unit 223 via the pipe P203.
  • the pressurized liquid supply unit 222 supplies the pressurized liquid L used for blow molding.
  • the pressurized gas supply unit 223 supplies the pressurized gas A.
  • the pressurized liquid supply unit 222 and the pressurized gas supply unit 223 are plunger pump types and use the pressurized fluid from the above-described pressurizing device 221 as a power source.
  • a pressurizing device for the pressurized gas supply unit 223 may be separately provided.
  • the pressurized liquid L supplied from the pressurized liquid supply unit 222 is supplied to the inside of the preform 231 through the pipe P202 and the electromagnetic valve Va through the through flow path 206a of the introduction cylinder unit 206.
  • a pressurized gas supply unit 223 for supplying the pressurized gas A is provided in the apparatus shown in FIG. 11.
  • the pressurized liquid L is supplied to the preform 231 and the mouth tube portion 232 expands and deforms due to the pressure
  • the pressurized gas A is supplied into the partition wall member 211 via the pipe P204.
  • the space S that is introduced and surrounds the outer peripheral surface of the mouth tube portion 232 of the preform 231 may be pressurized. Thereby, the diameter expansion deformation of the mouth tube portion 232 can be effectively suppressed.
  • FIGS. 12 to 15 sequentially show the molding process of the method for manufacturing a synthetic resin container according to an embodiment of the present invention using the apparatus shown in FIG.
  • a method for manufacturing a synthetic resin container that is, a blow molding method according to an embodiment of the present invention will be described with reference to FIGS.
  • blow molding the steps described in the following (1) to (5) are sequentially performed.
  • a preform 231 in which a portion excluding the mouth tube portion 232 is heated to a temperature suitable for stretch blow molding is used for blow molding with the mouth tube portion 232 protruding upward.
  • FIG. 13 As shown in FIG. 13, the assembled and fixed partition wall member 211 and the blow nozzle 204 are lowered from above the mouth tube portion 232, and the tip end portion of the fitting tube piece 205 is fitted into the mouth tube portion 232.
  • the pressurized liquid L is supplied into the preform 231 from the pressurized liquid supply part 222 of FIG.
  • the reform 231 is expanded in an expanded state, and the container 241 is shaped along the cavity 202 of the mold 201.
  • the electromagnetic valve Va is closed and the supply of the pressurized liquid L is stopped.
  • the bottom mold 201B is operated in the direction of pulling out, and at the same time the electromagnetic valve Vb is opened and gas is supplied from the outside to the container 241.
  • the thick convex portion forming the tapered surface 201B_1 is completely pulled out from the bottom 241B of the container 241.
  • the bottom mold 201B is operated in the direction in which the bottom mold 201B is pulled out from the bottom 241B of the container 241 while the convex part that is the hooked part of the bottom mold 201B is hooked on the center of the bottom 241B of the container 241.
  • the swelling direction of the bottom 241B of the container 241 is reversed from the inside of the container 241 to the outside of the container 241.
  • a volume change portion surrounded by the shape of the bottom portion 241B before the bottom mold 201B is pulled out and the shape of the bottom portion 241B ′ after the pulling out is formed in the mouth portion of the container 241 as the head space HS.
  • the assembled partition member 211 and the blow nozzle 204 are raised above the mouthpiece 232 to the position shown in FIG. Further, the body molds 201SL and 201SR are opened, and the container 241 filled with the liquid L and having the head space HS formed is taken out. The mouth tube portion 232 of the container 241 is sealed with a cap (not shown) to obtain a product.
  • FIG. 16A to 16C are explanatory views showing a blow molding method using a bottom mold 301B according to a first modification of the third embodiment of the present invention.
  • this bottom mold 301B includes a rod-shaped mold 301BC in which a thick convex portion having a tapered surface 301B_1 having a thick side surface is formed at the center, and a ring shape surrounding the rod-shaped mold 301BC. And a mold 301BR.
  • the tip of the rod-shaped mold 301BC forms a convex portion whose diameter increases toward the tip.
  • the bottom mold 301B is pulled out in two stages, unlike the bottom mold 201B. That is, first, as shown in FIG.
  • the entire bottom mold 301B including the rod-shaped mold 301BC and the ring-shaped mold 301BR is pulled out.
  • the shape of the bottom portion 241B is reversed to the shape of the bottom portion 241B ′.
  • the bar-shaped mold 301BC is further lowered, and the hooked portion (that is, the convex portion) is pulled out.
  • the assembled and fixed partition wall member 211 and the blow nozzle 204 are raised above the mouthpiece 232 to the position shown in FIG.
  • the body molds 201SL and 201SR are opened, and the container 241 filled with the liquid L and having the head space HS formed is taken out.
  • the mouth tube portion 232 of the container 241 is sealed with a cap (not shown) to obtain a product.
  • FIGSecond Modification> 17A to 17C are explanatory views showing a blow molding method using a bottom mold 401B according to a second modification of the third embodiment of the present invention.
  • this bottom mold 401B is composed of a rod-shaped mold 401BC formed at the center and a ring-shaped mold 401BR surrounding it.
  • the bottom molds 201B and 301B are operated in the direction of pulling out, and the bottom 241B of the container 241 and the bottom molds 201B and 301B are caught.
  • a gas is introduced into the container 241 at the same time as the bulging shape of the bottom 241B is reversed to the outside of the container 241 (that is, reversed from the bottom 241B to the bottom 241B ′).
  • a volume change surrounded by the shape of the bottom portion 241B before the bottom molds 201B and 301B are pulled out and the shape of the bottom portion 241B 'after the pulling out is formed as a head space HS in the mouth of the container 241.
  • the shape of the bottom 241B of the container 241 is changed to the container 241 by pushing up the central bar-shaped mold 401BC. Flip inside. Subsequently, as shown in FIG. 17C, the bottom portion 241B before the ring-shaped mold 401BC is pushed up by operating the ring-shaped mold 401BC in the direction of pulling out and introducing the gas into the container 241. And the shape of the bottom portion 241B ′′ after the ring-shaped mold 401BC is pushed up are formed in the mouth portion of the container 241 as the head space HS.
  • the assembled and fixed partition member 211 and the blow nozzle 204 are raised above the mouthpiece 232 to the position shown in FIG. Further, the body molds 201SL and 201SR are opened, and the container 241 filled with the liquid L and having the head space HS formed is taken out. The mouth tube portion 232 of the container 241 is sealed with a cap (not shown) to obtain a product.
  • FIG. 18 is a schematic explanatory diagram showing an overall configuration of a blow molding apparatus according to the fourth embodiment of the present invention.
  • the difference in configuration between the blow molding device according to the fourth embodiment shown in FIG. 18 and the blow molding device according to the third embodiment shown in FIG. 11 is that the configuration of the blow nozzle and the rod are added. is there.
  • a cylindrical hollow portion is formed inside the introduction cylinder portion 506, and the blow nozzle 504 configured by the fitting cylinder piece 505 and the introduction cylinder portion 506 is formed.
  • a cylindrical rod 508 for forming the head space HS is inserted and arranged coaxially.
  • a cylindrical introduction passage Fi is formed in the blow nozzle 504 by the blow nozzle 504 and the rod 508.
  • a servo mechanism (not shown) for driving the rod 508 is provided.
  • the blow molding apparatus which concerns on 4th Embodiment it is almost the same as the blow molding apparatus which concerns on 3rd Embodiment shown by FIG. Therefore, hereinafter, a blow molding method using the bottom mold 201B and the rod 508 in combination will be described, focusing on the above differences.
  • symbol is attached
  • the following steps (2 ′), (3 ′), and (4 ′) are provided after the step (2) described in the third embodiment.
  • (2 ′) The rod 508 is inserted into the preform 231 by a predetermined length Da (the length Da from the tip of the mouth tube portion 232 of the preform 231 to the tip of the rod 508).
  • (3 ′) The pressurized liquid L is supplied into the preform 231 through the introduction channel Fi via the through-flow channel 206a of the introduction cylinder portion 506, whereby the preform 231 is expanded and the mold 201 is expanded.
  • the container 241 is shaped along the cavity 202.
  • (4 ′) After the container 241 is shaped, the electromagnetic valve Va is closed and the supply of the pressurized liquid L is stopped.
  • the bottom mold 201B is pulled out, and the tip of the rod 508 is pulled out from the container 241 and pulled up to the tip of the mouth tube 232.
  • the electromagnetic valve Vb is opened and gas is introduced from the outside into the container 241, while the thick convex portion forming the tapered surface 201B_1 is formed at the bottom of the container 241. Pull out completely from 241B.
  • the volume change of the bottom of the container 241 (the portion surrounded by the shape of the bottom 241B and the shape of the bottom 241B ′) generated by pulling out the bottom mold 201B and the change in the internal volume generated by pulling up the rod 508. (A portion corresponding to the length Da of the rod 508) is formed in the mouth of the container 241 as the head space HS.
  • the volume change at the bottom of the container 241 generated by pulling out the bottom mold 201B and the volume change generated by pulling up the rod 508 are calculated. It can be used as a head space HS. Further, the head space HS can be controlled to a desired amount by adjusting the insertion length Da into the preform 231. Note that the bottom molds 301B and 401B may be used instead of the bottom mold 201B.
  • a desired amount of head space HS is provided to the container obtained by blowing the preform with the content liquid in the mold. Can be formed.
  • the spillage of the content liquid can be suitably prevented.
  • the bottom shape of the container swells to the outside of the container, when the inside of the container is depressurized after capping, the bottom shape is restored, and unauthorized deformation due to the decompression can be suitably prevented.
  • the positive pressure method in the container of the present invention it is possible to produce without using additional means such as liquid nitrogen dripping and compared with the conventional blow molding method using liquid as a pressure medium.
  • the inside of the container can be positively pressurized without impairing the properties.
  • a wide range of usage is expected as a method of filling the container with the content liquid.
  • the liquid headspace finally filled in the product such as beverages, cosmetics, and medicines at the same time as the shaping of the container can be easily and well reproduced with a predetermined amount. Moreover, it can adjust reliably. Expected to be used widely in the field of blow molding.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Ceramic Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
PCT/JP2013/059345 2012-03-30 2013-03-28 Procédé de fabrication d'un récipient contenant un fluide, procédé permettant de mettre sous pression l'intérieur d'un récipient, récipient rempli, procédé de moulage par extrusion-soufflage et dispositif de moulage par extrusion-soufflage Ceased WO2013147065A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US14/389,680 US10189594B2 (en) 2012-03-30 2013-03-28 Method for manufacturing a container containing a content fluid, a method for placing an inside of a container under a positive pressure, a filled container, a blow molding method, and a blow molding device
CN201380027916.XA CN104321270B (zh) 2012-03-30 2013-03-28 用于制造装有内装流体的容器的方法、用于对容器的内部加压的方法、填充容器、吹塑成型方法及吹塑成型装置
EP13768238.1A EP2832682B1 (fr) 2012-03-30 2013-03-28 Procédé de fabrication d'un récipient contenant un fluide et dispositif de moulage par extrusion-soufflage
EP18166154.7A EP3360843B1 (fr) 2012-03-30 2013-03-28 Procédé pour placer un intérieur d'un récipient sous une pression positive

Applications Claiming Priority (6)

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JP2012079005A JP5851308B2 (ja) 2012-03-30 2012-03-30 内容液入りボトルの製造方法
JP2012-079005 2012-03-30
JP2012145408A JP6000691B2 (ja) 2012-06-28 2012-06-28 容器内部の陽圧化方法及び充填容器
JP2012-145408 2012-06-28
JP2012170180A JP5919127B2 (ja) 2012-07-31 2012-07-31 ブロー成形装置及び合成樹脂製容器の製造方法
JP2012-170180 2012-07-31

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CN106715081A (zh) * 2014-07-31 2017-05-24 帝斯克玛股份有限公司 吹塑成型装置
WO2017168996A1 (fr) * 2016-03-31 2017-10-05 株式会社吉野工業所 Procédé de production de récipient par moulage par soufflage de liquide
JP2017177743A (ja) * 2016-03-31 2017-10-05 株式会社吉野工業所 液体ブロー成形による容器製造方法
EP3113926A4 (fr) * 2014-03-03 2017-11-15 Amcor Limited Élément de machine facilitant le déplacement d'une base de moule
JP2017226473A (ja) * 2016-06-24 2017-12-28 大日本印刷株式会社 飲料製品の製造方法
US11198243B2 (en) 2018-01-11 2021-12-14 Husky Injection Molding Systems Ltd. Method and apparatus for forming final-shaped containers using liquid to be contained therein

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JP6333577B2 (ja) * 2014-02-28 2018-05-30 株式会社吉野工業所 ブロー成形装置
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JP6450641B2 (ja) * 2015-04-30 2019-01-09 株式会社吉野工業所 液体ブロー成形装置および液体ブロー成形方法
JP6523035B2 (ja) 2015-04-30 2019-05-29 株式会社吉野工業所 液体ブロー成形装置及び液体ブロー成形方法
JP6437379B2 (ja) * 2015-04-30 2018-12-12 株式会社吉野工業所 液体ブロー成形装置および液体ブロー成形方法
GB201517737D0 (en) 2015-10-07 2015-11-18 Cambridge Entpr Ltd Layered materials and methods for their processing
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FR3045443B1 (fr) * 2015-12-16 2018-06-15 Sidel Participations Fond de moule pourvu d'un insert mobile central
WO2017168920A1 (fr) * 2016-03-30 2017-10-05 バンドー化学株式会社 Procédé de fabrication d'une courroie, ainsi que moule cylindrique et dispositif de pontage utilisés à cette fin
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JP6661477B2 (ja) * 2016-05-31 2020-03-11 株式会社吉野工業所 容器製造方法
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JP6864570B2 (ja) 2017-04-27 2021-04-28 株式会社吉野工業所 液体入り容器の製造方法
JP6837936B2 (ja) * 2017-06-30 2021-03-03 株式会社吉野工業所 液体入り容器の製造方法
JP6864573B2 (ja) * 2017-06-30 2021-04-28 株式会社吉野工業所 液体入り容器の製造方法
JP7026595B2 (ja) * 2018-08-31 2022-02-28 株式会社吉野工業所 液体入り容器の製造方法及び製造装置
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EP3348374B1 (fr) 2014-03-03 2020-08-26 Amcor Rigid Plastics USA, LLC Élément de machine facilitant le déplacement d'une base de moule
EP3348375B1 (fr) 2014-03-03 2020-09-09 Amcor Rigid Plastics USA, LLC Élément de machine facilitant le déplacement d'une base de moule
US10232545B2 (en) 2014-03-03 2019-03-19 Amcor Rigid Plastics Usa, Llc Machine component facilitating mold base movement
EP3348374A1 (fr) * 2014-03-03 2018-07-18 Amcor Group GmbH Élément de machine facilitant le déplacement d'une base de moule
EP3348375A1 (fr) * 2014-03-03 2018-07-18 Amcor Group GmbH Élément de machine facilitant le déplacement d'une base de moule
EP3113926A4 (fr) * 2014-03-03 2017-11-15 Amcor Limited Élément de machine facilitant le déplacement d'une base de moule
CN106715081A (zh) * 2014-07-31 2017-05-24 帝斯克玛股份有限公司 吹塑成型装置
EP2987732A1 (fr) * 2014-08-20 2016-02-24 Krones AG Remplisseuse de moule
WO2016079248A3 (fr) * 2014-11-19 2016-07-14 Carlsberg Breweries A/S Ensemble récipient de boisson pour contenir une boisson
JP2017177744A (ja) * 2016-03-31 2017-10-05 株式会社吉野工業所 液体ブロー成形による容器製造方法
JP2017177743A (ja) * 2016-03-31 2017-10-05 株式会社吉野工業所 液体ブロー成形による容器製造方法
WO2017168996A1 (fr) * 2016-03-31 2017-10-05 株式会社吉野工業所 Procédé de production de récipient par moulage par soufflage de liquide
US10556373B2 (en) 2016-03-31 2020-02-11 Yoshino Kogyosho Co., Ltd. Container production method by liquid blow molding
US10974438B2 (en) 2016-03-31 2021-04-13 Yoshino Kogyosho Co., Ltd. Container production method by liquid blow molding
JP2017226473A (ja) * 2016-06-24 2017-12-28 大日本印刷株式会社 飲料製品の製造方法
US11198243B2 (en) 2018-01-11 2021-12-14 Husky Injection Molding Systems Ltd. Method and apparatus for forming final-shaped containers using liquid to be contained therein
US11613062B2 (en) 2018-01-11 2023-03-28 Husky Injection Molding Systems Ltd. Method and apparatus for forming final-shaped containers using liquid to be contained therein

Also Published As

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EP2832682B1 (fr) 2018-07-25
CN104321270B (zh) 2016-03-02
EP3360843A1 (fr) 2018-08-15
EP2832682A4 (fr) 2016-04-27
US10189594B2 (en) 2019-01-29
EP2832682A1 (fr) 2015-02-04
CN104321270A (zh) 2015-01-28
EP3360843B1 (fr) 2020-07-15
US20150076105A1 (en) 2015-03-19

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